Module candlestick 

Candlestick (OHLC) chart. Each bar is an open/high/low/close tuple drawn as a wick (high→low) + a body (open↔close), coloured up/down from theme colours. The price→pixel mapping (OhlcLayout) is a pure function with tests so the geometry is verifiable headlessly.

Structs

CandlestickState

Persistent, observable interaction state (FC-3): the bar index the pointer last hovered. Serialized so it round-trips headlessly.

CandlestickView

A candlestick chart over a series of OHLC bars.

Ohlc

One OHLC bar. label is the x-axis tick (e.g. a date).

OhlcLayout

The price→pixel mapping for a candlestick chart: where each bar’s x-centre sits, the body half-width, and a y_of(price) closure source. Pure data so it can be asserted without a painter.

Enums

CandlestickEffect

FC-8: the candlestick chart does no I/O.

CandlestickMsg

FC-2 input surface. One input: the hovered bar changing (hit-tested purely in CandlestickView::render, applied in CandlestickView::update).